The Polymer Society of Korea

Abstract

3D printing with photo-curable resin has recently attracted attention due to its simplicity and ease of fabrication compared to conventional approaches. Titanium dioxide(TiO₂), known for its high refractive index and excellent transmittance, is widely incorporated into photo-curable resins for optical applications. However, the presence of photocurable molecules inevitably reduces the overall refractive index.
To address this limitation, we doped the TiO₂ with Fe, inducing a reduction in grain size and enhanced light-electron interactions, thereby increasing the refractive index. In addition, the surface of Fe-dopped TiO₂ nanoparticles was functionalized with photocurable ligands, while excess resin was removed to further improve the refractive index.
As a proof of concept, Fe-doped TiO₂ photocurable nanocomposites were employed to fabricate patterned films, demonstrating a promising approach for high-performance metasurface fabrication.